Casting



Au 14; 1923. 11,465,11116 v J. A. DEWIRE CASTING Filed July 24 1922il'lillll? Patented Aug. 14, 1923.

warren sraras an arc.

. JOHN A. nEwmE, or CHICAGO, rumors, ASSIGNOR 'ro MILLER a runner, mm,or

. CHICAGO, I Lmoxs, A conrona'rrou or rumors.

cas'rrne.

Application filed July 24, 1922. Serial No. 577,009.

To all whom it may concem:

Be it known that 1, JOHN A. Dnwlnn, a

i citizen of the United. States, and a resident of Chicago, county ofCook, State of Illinois, have invented an Improvement in Castings,

of which the following is a specification.

This invention relates to casting, and with regard to certain morespecific features, to die'casting.

Among the several objects of the invention may be noted the provision ofa simple and efi'ective construction of a casting; and the provision ofan inexpensive and reliable method of making castings having elementsrotatably mounted therein. will be in part obvious out hereinafter.

The invention accordingly comprises the features of construction, stepsand sequence of steps, combinations of elements and arrangements ofparts, which are exemplified in the description hereinafter inconnection with the accompanying drawings, and the Other objects and inpart pointed scope of the application of which will be indicated in thefollowing claims.

In the accompanying drawings, in which is illustrated somewhatdiagrammatically one of various possible embodiments of the invention,

Figure 1 is a face view of a rotatable element, having a ferrulethereon;

Fig. 2 is a fragmentary section on the line 22 thereof, on an enlargedscale;

Fig. 3 is a similar view of Fig. 1 showing the element as it appearsafter the casting operation;

Fig. 4 is a fragmentary section on the line 4- of Fig. 3, on an enlargedscale;

Fig. 5 is a plan of a die element, taken on v the line 5,5 of Fig. 6;and

Fig. dis a section on the line 6-6 of Fig. 5.

Similar reference characters indicate corresponding parts throughout theseveral views of the drawings.

Referring now more particularly to Figs. 1 to 4 of the accompanyingdrawings, there is illustrated at 1 an element such as a bail adapted tobe rotatably mounted within a casting 3 (Figs. 3-4). I

l have found that if the rotatable element is merely placed in the dieblocks and the metal cast around it, it is difiicult or im- 1 providethe rotatable element with a metallic ferrule 5 (Figs. 1 and 2) prior tothe casting operation. The ferrule is long enough so that when thearticle is placed in the die blocks (Figs. 5 and 6) the ferrule extendsentirely across the surface for the cast metal.

The ferrule has a diameter slightly larger than the outside diameter ofthe rotatable member, providing enough clearance so that the ferrule isrotatable with respect to said member.

The ferrule is of sufficient mechanical strength to withstand thecompression encountered during the die casting operation. The die blocksare shown conventionally in Figs. 5 and 6 as comprising two blocks orhalves 9, 10, recessed to provide space for the cast metal around thebail and ferrule. Spaces are also provided at 13 for the entrance of themetal from a suitable source (not shown). A slight clearance is providedat 15 between the two blocks, to permit escape of air. The blocks areshown as adapted for the simultaneous casting of two articles. Obviouslythey could be adapted for the casting of one article only, or of morethan two articles.

The complete article is shown in Figs. 3 and 4.

From the above it will be seen that the several objects of the inventionare attained and other advantageous results achieved.

As many modifications of the embodiment above illustrated might be madewithout departing from the spirit or scope of the present invention, itis intended that the above description and accompanying drawings andclaims shall be interpreted as illustrative and not in a limiting sense.

Tel-aim:

1. The method of die casting an article having a movable elementtherein, which comprises surrounding the movable element with a membermovable with respect to said element and adapted to resist thecompression encountered during die casting, and then casting the articlearound said member.

2. The method of die casting an article having a movable elementtherein, which comprises surrounding the movable element, at all pointsliable to come in contact with the cast metal, with a member spaced fromsaid element and adapted to resist the compression. encountered duringdie casting, and then casting the article around said member.

3. The method of die casting an article having an element rotatabletherein, which comprises surrounding the element, at all points liableto come in contact with the cast metal, with a ferrule adapted to resistthe compression encountered during die casting, and then casting thearticle around said member.

4. A die casting having a movable element therein separated from thecast metal by a member movable with respect to said element andadapted-to withstand the compression encountered during die casting.

5. A die castinghaving a movable element therein separated from the castmetal by a member spaced from said element and adapted to withstand thecompression encountered during die casting.

6. A die casting having an element rotatable therein separated from thecast metal by a ferrule adapted to withstand the compression encounteredduring die casting.

7. In combination, an article adapted to be inserted in a die castingand to be movable therein, and a member surrounding it at points liableto come in contact with the cast metal, and movable with respect to thearticle and adapted to withstand the compression encountered duringcasting.

8. In combination, an article adapted to be inserted in a die castingand to be movable therein, and a member surrounding it at all pointsliable to come in contact with the cast metal, and spaced from thearticle and adapted to withstand the compression encountered duringcasting.

9. In combination, an article adapted to be inserted in a die castingand to be rotatable therein, and a ferrule surrounding it at all pointsliable to come in contact with the cast metal and adapted to withstandthe compression encountered during casting.

In testimony whereof, I have signed my name to this specification this20th day of July, 1922.

v JOHN A. DEWIRE.

